Car-ventilator.



No. 665,!69. j Patented Ian. I, 190i. L. H. BOWMAN.

OAR VENTILATOR.

(Application filed Nov. 9, 1899. Renewed Oct. 29, 1900.)

(N0 Model.)

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: UVVENTOH 7 Q AWOH/VEYS WITNESSES UNITED STATES ATENT OFFICE.

LEWIS H. BOWMAN, OF WALLA WALLA, WASHINGTON.

CAR-VENTILATO R.

SPECIFICATION forming part of Letters PatentNo. 665,169, dated January1, 1901.

Application filed November 9, 1899. Renewed October 29, 1900. terial No.34,804. (No model.)

To all whom, it may concern:

Be it known that I, LEWIS H. BOWMAN, a citizen of the United States, anda resident of Walla Walla, in the county of Walla Walla and State ofWashington,have invented anew and Improved Oar-Ventilator,of which thefollowing is a full, clear, and exact description.

This invention relates to improvements in ventilators for cars, theventilator being in the form of a fan adapted by its rotation to coolthe atmosphere and to drive floating dust from the car; and the objectis to provide, in connection with the ventilating-fan,a motor operatedby the current of wind when the car is in motion.

I will describe a car-ventilator embodying my invention and then pointout the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a section on the linel l of Fig. 2 of the ventilatorembodying my invention. Fig. 2 is a section on the line 2 2 of Fig. 1,and Fig. 3 is a bottom plan view of the ventilating-fan and its support.

Referring to the drawings, 1 designates the ,roof of a car, on which ismounted a turret 2,

position, the hub-section 5 is prevented fromv movement relatively tothe section 6 by means of a set-screw 9, which passes through one of thearms 4 and engages in a recess formed in the upper end of the section 6.A shaft 10 has screw-thread engagement with the hubsection 5, as clearlyindicated in Fig. 1, and this shaft-extends downward through the cup 8,and at its lower end it has an annular ring 11, upon the upper surfaceof which bearingballs 12 are arranged in a ring-like cup 13,

attached to straps or arms 14, bolted to the roof of the car.

Mounted on an angular portion 15 of the shaft- 10 is a fan, consistingof outwardly-extended blades 16, which are arranged at a transverseincline.

For the purpose of holding the fan from rotation when desired I employ alocking device, here shown as consisting of a bolt 17, movable throughlugs formed on one of the straps 14: and normally held inward to engagein a notch in the portion 11 of the shaft 10 by means of a spring 18. Todisengage the bolt from the shaft, the bolt is to be drawn outward, andit may be held in its outer position by engaging its crank end 19 withthe outer side of a lug 20 on the strap 14.

In operation as the car'is moving along the current of air passingthrough the turret will cause the motor-fan to rotate rapidly, and thisof course will cause the ventilating-fan to rotate rapidly in the car;but the turret may be dispensed with. however, as it not onlydirects thecurrent of wind directly to the motor-fan, but it serves as a housing orprotection for said fan.

Having thus fully described my invention, I claim as new and desire tosecure by Letter Patent 7 I 1. In a car-ventilator, the combination of ahub formed of sections detachably secured together,one of the sectionsbeing provided with arms, blades secured to the arms in position to berevolved by the wind, a shaft having one end mounted in a bearing andits other end detachably secured to the hub, and a fan mounted upon saidshaft, substantially as described.

2. In a car-ventilator, the combination of a hub formed of sections, onesection being internally screw-threaded and the other exteriorlyscrew-threaded and provided with outwardly-extending arms and athreadedbore, means for locking the sections of the hub together, blades carriedby the arms of the hub in position to be revolved by the wind, a shafthaving one end mounted in a bearing and its other end screw-threaded andscrewing into the bore of the hub-section, and a fan on the said shaft,substantially as described.

3. A ventilator, comprisinga fan arranged I prefer to use it,

on the inner side of the car-roof, a shaft on which the said fan ismounted, said shaftbeing extended through the car-roof andscrewthreaded, a hub having connection with the screw-thread of theshaft and formed of two sections detachably secured together, onesection being provided With arms and the other with araceway for balls,spoon-shaped blades on the arms in position to be revolved by the wind,bearing-balls in the raceway of the lower hub-section, a ring-shaped cupsecured to the inner side of the car-roof and supporting saidbearing-balls, and bearing-balls for the lower portion of the saidshaft, substantially as specified.

4. In a car-ventilator,tl1e combination with the roof of a car, and aturret thereon, of a hub mounted in the roof of the car and extendinginto the turret, said hub being provided with a threaded bore andoutwardlyextending arms, blades secured to said arms in position to berevolved by the wind, arms secured to the under side of the roof andprovided with a bearing, a shaft having one end mounted in the bearingand its other end screw-threaded and screwing into the bore of the hub,a fan on said shaft, and means for locking the shaft stationary,substantially as described.

5. In acar-ventilator,tl1e combination with a fan-shaft having one endmounted in a support, and its other end threaded, of a hub formed ofsections, one section being internallyscrew-threaded and the other exteriorly screw-threaded and provided With arms and a threaded bore,blades secured to the arms

